We are no longer shipping updates for UE3 or UDK.

Unreal Engine 3 (UE3)

UE3 was the leading engine of the previous generation. For new projects, we support UE4.

Unreal Development Kit (UDK)

Unreal Development Kit is the free edition of Unreal Engine 3. We longer support UDK, and recommend beginning new projects for free using UE4, which brings you all the latest engine features as well as full source code access.


Welcome to the Unreal Development Kit (UDK) documentation start page, with all the details you need to become an expert with the award-winning Unreal Technology.

Latest Developments

The latest news updates for UDK are available at Unreal Development Kit News.

Essential Reading

Technical & Programming

Information on programming, debugging, optimizing and scripting with UDK and UnrealScript. Also includes technical reference material.

Content Creation - Art, Audio and Level Design

Definitive collection of articles and tutorials on modelling, texturing and animating for UDK, as well as music and sound creation.

Support & Community

There are a lot of great resources devoted to the Unreal Development Kit on the net. Here are links to some of the best ones. The UDK forum is the place to go for questions, feature requests and discussions about UDK. 

UDK PC Specs


  • Windows XP SP3 or Windows Vista
  • 2.0+ GHz processor
  • 2 GB system RAM
  • SM3-compatible video card
  • 3 GB Free hard drive space

Recommended for Content Development:

  • Windows 7 64-bit
  • 2.0+ GHz multi-core processor
  • 8 GB System RAM
  • NVIDIA 8000 series or higher graphics card
  • Plenty of HDD space

Minimum for DX11 Development:

  • Windows Vista
  • 2.0+ GHz processor
  • 2 GB system RAM
  • DX11 Graphics Card
    • Nvidia: 400 series or above
    • ATI: 5000 series or above
  • 3 GB Free hard drive space